For years, Mac devotees have bragged that their platform was superior because it was safer. Nobody wrote viruses for Macs, so they didn't even need anti-virus protection like their PC counterparts. Well, as the Apple has grown in popularity, its safety bragging rights have dissipated. Yesterday Dr. Web, a Russian antivirus company, announced that nearly 600,000 Macs are infected with the Flashback Trojan, a nasty malware designed to steal your information. The Flashback Trojan was initially found last year, pretending to be a fake Adobe Flash Player plug-in installer. But its nastiness has only increased. Now it tries to steal your passwords and other personal information through your Web browsers and applications. If you are a Mac user, you should definitely determine if your computer is infected. The smart people over at CNET recommend running some commands in Terminal. Open Terminal, and copy and paste the code strings below into the terminal window. (Not sure what Terminal is? Just do a Spotlight search for it.) defaults read /Applications/Safari.app/Contents/Info LSEnvironment defaults read /Applications/Firefox.app/Contents/Info LSEnvironment defaults read ~/.MacOSX/environment DYLD_INSERT_LIBRARIES Once the code has been entered, the program will run automatically. If the commands return with a  "does not exist" if your computer is clean. If anything else comes up, you're infected. If your computer is safe and clean, congratulations! But what if you are infected? Again, those smart folks at CNET have the answer for you. Find out how to remove Flashback from your Mac from Topher Kessler, or try this Flashback-removal walkthrough from security firm F-Secure. It is probably safe to assume that Mac attacks like this will start happening more and more often. The best thing to do is be careful what you download and access. Avoid third-party add-ons when possible, and do your best to stay safe out there.